Loose-leaf binder.



N0. 806,702. PATENTED'DEQB, 1905. G. R. NELSON, J. 0. DAWSON 6: E. A. TRUSSELL.

LOOSE LEAP BINDER.

APPLICATION FILED MAY 4, 1906.

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LMwS 6730221,

UNITED sTATEs PATENT oFFIoE.

CHARLES R. NELSON, OF CHICAGO, ILLINOIS, AND JAMES C. DAWSON, OF

ST. LOUIS COUNTY, AND EMORY A. TRUSSELL, OF ST. LOUIS, MIS- SOURI, ASSIGNORS TO SIEBER &, TRUSSELL OF MISSOURI.

MFG. CO., A CORPORATION LOOSE-LEAF BINDER.

Specification of Letters Patent.

Patented Dec. 5, 1905.

To ctZZ whom it may concern:

Be it known that we, CHARLES R. N ELSON, a resident of Chicago, county of Cook, and State of Illinois, and JAMEs C. DAWSON, of the county of St. Louis, and EMORY A. TnUssELL, of the city of St Louis, State of Missouri, citizens of the United States, have invented certain new and useful Improvements in Loose-Leaf Binders, of which the following is a specification and which are illustrated in the accompanying drawings, forming a part thereof.

The invention relates to that type of looseleaf binder which comprises a pair of plates hinged together and carrying prongs which pass through the leaves to be bound.

The object of the invention is to generally improve the construction of devices of this kind and to simplify their operation; and it consists in the device hereinafter described and which is illustrated in the accompanying drawings, in which Figure 1 is an end elevation of the binder mechanism open. Fig. 2 is a detail section of the end of the binder closed and showing the locking mechanism. Fig. 3 is a plan view of the binder closed. Fig. 4 is a central longitudinal section of the binder, showing a modified form of construction; and Figs. 5 and 6 are sectional details on the lines 5 5 and 6 6, respectively, of Fig. 4.

The binder comprises a pair of metal plates 10 11, each having the general contour of a right angle in cross-section, the sharp angle effect, however, being avoided by curving the plate to the desired form. One leaf, as 12 13, of each of these plates constitutes a side of the binder, and the other leaves, as 14 15, constitute together the back thereof. The edges of the leaves 14 15 are united bywhat is known as the piano-oase.form of hinge, the sections of each of the leaves being prolonged and overturned, as shown at 16,- to receive the pivot-rod 17, which extends the entire length of the binder.

Each of the plates 10 and 11 is provided with end plates 18 19, which extend to both of its edges and are somewhat wider at their outer than at their inner ends, and hence overlap when the binder is closed. One of these end plates, as 18, is apertured to accommodate a headed stud 20, carried by a leaf-spring 21, riveted to the inner face of the plate. The other plate, as 19, is provided with a T-shaped'recess 22, entering from its front edge, its throat being of sufficient width to receive the shank 23 of the stud 20. The inner end of the shank 23 is enlarged, as shown at 24, and this body portion is beveled at 25 in order that as the binder is closed the edge of the plate 19 will force the stud inwardly against the resistance of the spring 21 by a cam action, bringing the contracted portion 23 of its shank in line with the aperture 22, the stud springing outwardly as soon as its body portion 24 comes into register with the enlarged portion of the recess 22, and thus securely looking the binder. The look is easily released by inward pressure on the head 20 of the stud.

In the form of construction shown in Figs. 4, 5, and 6 'the locking mechanism already describedand located at both ends of the binder is controlled by a single push-rod 26, the ends of which comprise or carry the looking-studs, as shown at 27 28, The rod 26 is bent downwardly adjacent its ends, as shown at 29 30, in order that it may not interfere with the inner edges of the leaves to be bound One end of the rod is prolonged beyond the end of the binder and provided with a thumb-plate 31. In this form of construction the locking-stud at one end, as shown at 27, has the contracted portion of its shank at the inner end, as shown at 32. Pressure upon the thumb-plate 31 will therefore disengage the body portion of both of the locking-studs simultaneously and allow the binder to be opened.

The arches or prongs 83 34 are fixed in the side portions 12 13 of the plates and are preferably bowed and of such length as to extend approximately to the opposite side of the binder when the latter is closed.

We claim as our-invention 1. In a binder, in combination, a pair of side plates having end flanges and being pivotally united; a spring-stud carried by a flange of one of the plates and adapted to enter a T- slot in the adjacent flange of the other plate, such stud having its body enlarged at its base to a greater diameter than the throat of the slot.

2; In a binder, in combination, a pair of angle-plates hinged together and having end flanges of such Width that they overlap When the binder is closed, one of such end flanges having a T-slot entering from its front end; and a spring-stud having its body enlarged at its base to a greater diameter than the throat of the slot, such enlargement being beveled.

3. In a binder, in combination, a pair of angle-plates hinged together, and having end flanges of sufficient Width to overlap When the binder is closed; spring-catches for locking the flanges together at both ends of the binder and a push-rod connecting the catches and projecting through-one end flange.

CHARLES R. NELSON. JAS. C. DAWSON. EMORY A. TRUSSELL.

Witnesses to signature of Charles R. Nelson:

E. M. KLATCHER, CHARLES B..G1LLsoN.

Witnesses to signature of James C. Dawson:

EDWIN W. MILLs, F. H. NELSON.

Witnesses to signature of Emory A. Trussell:

HERBERT C. EMERY, F. H. NELSON. 

